The Smart App Sinewave LCD UPS Series provides an advanced level of power protection to support mission-critical servers, telecom equipment, VOIP and internetworking hardware. The PR3000LCDRT2U has both a Pure Sinewave waveform and Full Automatic Voltage Regulation (AVR) technology, which delivers a consistent and clean AC signal that protects connected equipment and prevents costly business interruptions. The multifunction LCD readout provides ready access to power/battery condition vitals, such as: Runtime, Load, Temperature, and much more. The unit also features a battery expansion interface for an additional battery pack in order to increase back-up time. It includes eight (8) battery and surge protected NEMA 5-15R output receptacles, including four (4) that are designed to serve as fail-safe options for protecting critical loads. It also comes with four maintenance-free, user-replaceable 12V/9Ah batteries.